fix build for buster

ax_init_standard_project.m4

@@ -218,7 +218,7 @@ AC_DEFUN([AX_INIT_STANDARD_PROJECT], [
   AX_SUBST(AUTHOR_URL)
   AX_SUBST(AUTHOR_MAIL)
   AX_SUBST(PACKAGER)
-  PROJECT_URL="${PROJECT_URL:-${AUTHOR_URL}/projects/${PACKAGE_NAME}}"
+  #PROJECT_URL="${PROJECT_URL:-${AUTHOR_URL}}"
   SOURCE_DOWNLOAD="${SOURCE_DOWNLOAD:-${AUTHOR_URL}/downloads/${PACKAGE_NAME}}"
   AX_SUBST(PROJECT_URL)
   AX_SUBST(SOURCE_DOWNLOAD)
@@ -365,12 +365,13 @@ AC_DEFUN([AX_USE_CXX], [
 #### Begin: Appended by $0
 %.app: %
 	-rm -r [\$][@]
-	\$(MAKE) DESTDIR=[\$][\$](pwd)/[\$][@]/tmp install
+	\$(MAKE) DESTDIR=[\$][\$](pwd)/tmp install
 	QTDIR="\${QTDIR}" \
 	QT_PLUGINS="\${QT_PLUGINS}" \
 	QT_PLUGIN_PATH="\${QT_PLUGIN_PATH}" \
 	  \${top_builddir}/mac-create-app-bundle.sh \
-	    [\$][@] [\$][<] [\$][\$](pwd)/[\$][@]/tmp\${prefix}
+	    [\$][@] [\$][<] [\$][\$](pwd)/tmp[\$]{prefix}
+	-rm -rf tmp
 
 maintainer-clean-cxx-targets:
 	-rm makefile.in